<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>

  <body>
    <div id="app">
      <div>
        <span>姓名:</span>
        <input type="text" v-model="listName" />
      </div>
      <div>
        <span>年龄:</span>
        <input type="number" v-model="listAge" />
      </div>
      <div>
        <span>性别:</span>
        <select v-model="listGender">
          <option value="男">男</option>
          <option value="女">女</option>
        </select>
      </div>
      <div>
        <button @click="add">添加/修改</button>
      </div>
      <div>
        <table border="1" cellpadding="10" cellspacing="0">
          <tr>
            <th>序号</th>
            <th>姓名</th>
            <th>年龄</th>
            <th>性别</th>
            <th>操作</th>
          </tr>
          <tr v-for="(item,index) in list">
            <td>{{ index + 1 }}</td>
            <td>{{ item.name }}</td>
            <td>{{ item.age }}</td>
            <td>{{ item.gender }}</td>
            <td>
              <button @click="del(index)">删除</button>
              <button @click="edit(index)">编辑</button>
            </td>
          </tr>
        </table>
      </div>
    </div>
    <script src="./vue.js"></script>
    <script>
      const app = new Vue({
        el: "#app",
        data: {
          list: [
            { name: "Tome", age: 19, gender: "男" },
            { name: "Joke", age: 21, gender: "女" },
            { name: "小李", age: 18, gender: "男" },
          ],
          listName: "",
          listAge: 0,
          listGender: "",
          currentIndex: -1,
        },
        methods: {
          add() {
            if (this.currentIndex === -1) {
              this.list.push({
                name: this.listName,
                age: this.listAge,
                gender: this.listGender,
              });
            } else {
              this.list[this.currentIndex].name = this.listName;
              this.list[this.currentIndex].age = this.listAge;
              this.list[this.currentIndex].gender = this.listGender;
              this.currentIndex = -1;
            }
            this.listName = "";
            this.listAge = "";
            this.listGender = "";
          },
          del(index) {
            this.list.splice(index, 1);
          },
          edit(index) {
            this.listName = this.list[index].name;
            this.listAge = this.list[index].age;
            this.listGender = this.list[index].gender;
            this.currentIndex = index;
          },
        },
      });
    </script>
  </body>
</html>
